- All sections
- E - Fixed constructions
- E21B - Earth or rock drillingobtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 17/14 - Casing shoes
Patent holdings for IPC class E21B 17/14
Total number of patents in this class: 142
10-year publication summary
|
4
|
7
|
12
|
9
|
8
|
9
|
20
|
9
|
6
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21090 |
16 |
| Baker Hughes Incorporated | 5172 |
9 |
| Saudi Arabian Oil Company | 13686 |
9 |
| Baker Hughes Oilfield Operations, LLC | 2393 |
8 |
| Weatherford Technology Holdings, LLC | 2034 |
7 |
| Deep Casing Tools, Ltd. | 38 |
6 |
| ConocoPhillips Company | 1689 |
5 |
| NCS Multistage Inc. | 181 |
5 |
| Oy Atlas Copco Rotex Ab | 18 |
5 |
| WWT North America Holdings, Inc. | 55 |
5 |
| Baker Hughes Holdings LLC | 3002 |
4 |
| Enventure Global Technology, L.L.C. | 84 |
3 |
| Downhole Products Limited | 46 |
3 |
| Forum US, Inc. | 342 |
3 |
| Neodrill AS | 40 |
3 |
| Schlumberger Technology Corporation | 11075 |
2 |
| Expro North Sea Limited | 233 |
2 |
| Frank's International, LLC | 240 |
2 |
| Terraroc Finland Oy | 19 |
2 |
| Downhole Products Limited | 15 |
2 |
| Other owners | 41 |